NEC POWERMATE 5100 - SERVICE, Service Manual

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3-2 Disassembly and Reassembly
This section contains step-by-step disassembly procedures for the system unit. A
simplified disassembly illustration is provided with most procedures. Section 6
includes a parts list and an illustrated parts breakdown showing an exploded
view of the system.
A Phillips-head screwdriver is the only required tool. For complete disassembly
of the system unit, follow the disassembly order listed in the following table. To
reassemble, follow the table and procedures in reverse order.
Individual removal procedures do not require the total disassembly of the
computer. Each of the following subsections lists the parts that must be removed
before beginning the removal procedure.
PowerMate 5100 Series Disassembly Sequence
Sequence Part Name See Page
1 System unit cover 3-3
2 Expansion board 3-6
3 Front panel 3-6
4 Blank panel and metal slot cover 3-8
5 DIMM memory module 3-9
6 Processor subsystem 3-9
7 5 1/4-inch device 3-10
8 3 1/2-inch hard drive 3-11
9 3 1/2-inch diskette drive 3-12
10 Power supply 3-13
11 System board 3-14
12 Riser board 3-18
13 CMOS battery 3-19
When disassembling the system unit, follow these general rules.
„
Before opening the system or handling boards or chips, touch the frame
to discharge static.
„
Disconnect all peripherals before disassembling the system unit.
„
Do not disassemble parts other than those specified in the procedure.
„
All screws are Phillips-head, unless otherwise specified.
„
Label any connector before removing it. Note where the connector goes
and in what position it was installed.
On completion of any reassembly, perform a power-on test. If a fault occurs,
verify that the reassembly was performed correctly.